Zhang Yong, Liang Chuoxi, Ye Shiyang, Xiao Guoquan
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引用次数: 0
Abstract
To solve the problem of uneven dust cleaning in filter cartridges, a simple and easy-to-install "branch-type" nozzle structure was designed to improve cleaning efficiency. In this study, numerical simulations, range analysis methods, orthogonal experimental design, back-blowing experiments, and powder cleaning experiments were conducted. By choosing the back-blowing uniformity as the evaluation index for cleaning performance, with the flow distribution coefficient A, length of branch pipe B, and outlet diameter of main pipe C as the factors, and ignoring the interaction between factors, an orthogonal experiment was designed to simulate the fluid flow field of nine different nozzle structures installed in the back-blowing model. The results were analyzed using range analysis methods, and the optimal nozzle structure parameter combination was determined to be A = 50%/40%/10%, B = 70 mm, and C = 18 mm. Based on the back-blowing experiment, the accuracy of the simulation results was verified, and the back-blowing uniformity was improved by 50.12%. In the powder cleaning experiment, a new method of measuring the mass of dust shaken off by a single pulse of cleaning to calculate the residual dust on the filter cartridge, rather than removing the filter cartridge and weighing it, was found to reduce experimental errors and make the conclusions more solid and convincing. The results showed that the "branch-type" nozzle increases the cleaning efficiency by 37.6% compared with no nozzle installed, proving that the "branch-type" nozzle can reduce the number of reverse cleaning required and extend the cleaning interval, thus optimizing the cleaning performance of the dust collector.
为解决滤筒清灰不均匀的问题，设计了一种结构简单、易于安装的 "分支式 "喷嘴，以提高清灰效率。本研究采用数值模拟、范围分析方法、正交实验设计、反吹实验和清粉实验等方法进行了研究。选择反吹均匀度作为清洗性能的评价指标，以流量分布系数 A、支管长度 B 和主管出口直径 C 为因子，忽略因子间的相互作用，设计了正交实验，模拟了反吹模型中安装的九种不同喷嘴结构的流体流场。采用范围分析方法对结果进行了分析，确定最佳喷嘴结构参数组合为 A = 50%/40%/10%, B = 70 mm, C = 18 mm。根据反吹实验，验证了模拟结果的准确性，反吹均匀度提高了 50.12%。在清粉实验中，发现了一种新方法，即测量单脉冲清粉抖落的粉尘质量来计算滤筒上的残留粉尘，而不是拆下滤筒称重，这种方法减少了实验误差，使结论更可靠、更有说服力。结果表明，与不安装喷嘴相比，"分支型 "喷嘴的清灰效率提高了 37.6%，证明 "分支型 "喷嘴可以减少所需的反向清灰次数，延长清灰间隔，从而优化除尘器的清灰性能。
期刊介绍：
Science Progress has for over 100 years been a highly regarded review publication in science, technology and medicine. Its objective is to excite the readers'' interest in areas with which they may not be fully familiar but which could facilitate their interest, or even activity, in a cognate field.
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